421124531 has 4 divisors (see below), whose sum is σ = 443289000. Its totient is φ = 398960064.

The previous prime is 421124519. The next prime is 421124533. The reversal of 421124531 is 135421124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421124531 - 2⁶ = 421124467 is a prime.

It is a super-2 number, since 2×421124531² = 354691741219939922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421124497 and 421124506.

It is not an unprimeable number, because it can be changed into a prime (421124533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11082206 + ... + 11082243.

It is an arithmetic number, because the mean of its divisors is an integer number (110822250).

Almost surely, 2^421124531 is an apocalyptic number.

421124531 is a deficient number, since it is larger than the sum of its proper divisors (22164469).

421124531 is a wasteful number, since it uses less digits than its factorization.

421124531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164468.

The product of its digits is 960, while the sum is 23.

The square root of 421124531 is about 20521.3189390936. The cubic root of 421124531 is about 749.5550136647. Note that the first 3 decimals are identical.

Adding to 421124531 its reverse (135421124), we get a palindrome (556545655).

The spelling of 421124531 in words is "four hundred twenty-one million, one hundred twenty-four thousand, five hundred thirty-one".